Advertisement

Astronomy Letters

, Volume 45, Issue 2, pp 92–103 | Cite as

Search for Evolutionary Changes in the Periods of Cepheids: CF Cas

  • L. N. BerdnikovEmail author
  • E. N. Pastukhova
Article

Abstract

For the classical Cepheid CF Cas we have constructed an O-C diagram spanning a time interval of 129 years. The O-C diagram has the shape of a parabola, which has made it possible to determine for the first time the quadratic light elements and to calculate the rate of evolutionary decrease in the period, dP/dt = −0.050 (±0.006) syr−1, in agreement with the results of theoretical calculations for the second crossing of the instability strip. The available data reduced by the Eddington-Plakidis method show no random period fluctuations, i.e., the parabola on the O-C diagram reflects a real evolutionary decrease in the period.

Keywords

Cepheids period variability stellar evolution 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. Alfonso-Garzon, A. Domingo, J. M. Mas-Hesse, and A. Gimenez, Astron. Astrophys. 548, A79 (2012).ADSCrossRefGoogle Scholar
  2. 2.
    S. Beljawsky, Astron. Nachr. 243, 115 (1931).ADSCrossRefGoogle Scholar
  3. 3.
    L. N. Berdnikov, Perem. Zvezdy 22, 369 (1986).ADSGoogle Scholar
  4. 4.
    L. N. Berdnikov, Perem. Zvezdy 22, 530 (1987).ADSGoogle Scholar
  5. 5.
    L. N. Berdnikov, Sov. Astron. 18, 207 (1992a).Google Scholar
  6. 6.
    L. N. Berdnikov, Astron. Astrophys. Trans. 2, 1 (1992b).ADSCrossRefGoogle Scholar
  7. 7.
    L. N. Berdnikov, Astron. Astrophys. Trans. 2, 31 (1992c).ADSCrossRefGoogle Scholar
  8. 8.
    L. N. Berdnikov, Astron. Astrophys. Trans. 2, 43 (1992d).ADSCrossRefGoogle Scholar
  9. 9.
    L. N. Berdnikov, Astron. Astrophys. Trans. 2, 107 (1992e).ADSCrossRefGoogle Scholar
  10. 10.
    L. N. Berdnikov, Astron. Astrophys. Trans. 2, 157 (1992f).ADSCrossRefGoogle Scholar
  11. 11.
    L. N. Berdnikov, Sov. Astron. Lett. 18, 130 (1992g).ADSGoogle Scholar
  12. 12.
    L. N. Berdnikov, Sov. Astron. Lett. 19, 84 (1993).Google Scholar
  13. 13.
    L. N. Berdnikov and O. V. Voziakova, Astron. Lett. 21, 308 (1995).ADSGoogle Scholar
  14. 14.
    L. N. Berdnikov, V. V. Ignatova, and O. V. Vozyakova, Astron. Astrophys. Trans. 14, 237 (1997).ADSCrossRefGoogle Scholar
  15. 15.
    L. N. Berdnikov, V. V. Ignatova, and O. V. Vozyakova, Astron. Astrophys. Trans. 17, 87 (1998).ADSCrossRefGoogle Scholar
  16. 16.
    A. W. J. Cousins, Mem. RAS 81, 25 (1976).ADSGoogle Scholar
  17. 17.
    A. S. Eddington and S. Plakidis, Mon. Not. R. Astron. Soc. 90, 65 (1929).ADSCrossRefGoogle Scholar
  18. 18.
    G. E. Erleksova, Byull. Inst. Astrofiz. AN Tadzh. SSR, No. 30, 28 (1961).Google Scholar
  19. 19.
    ESA, The Hipparcos and Tycho Catalogues, ESA SP-1200 (ESA, Noordwijk, 1997).Google Scholar
  20. 20.
    Yu. A. Fadeyev, Astron. Lett. 40, 301 (2014).ADSCrossRefGoogle Scholar
  21. 21.
    H. C. Harris, Theses (Univer. Washington, 1980).Google Scholar
  22. 22.
    E. Hertzsprung, Astron. Nachr. 210, 17 (1919).ADSCrossRefGoogle Scholar
  23. 23.
    C. Hoffmeister, Mitt. Veraenderl. Sterne 7 (12) (1942).Google Scholar
  24. 24.
    S. Kafka, The AAVSO International Database. https://doi.org/www.aavso.org. Accessed 2018.Google Scholar
  25. 25.
    C. S. Kochanek, B. J. Shappee, K. Z. Stanek, T.W.-S. Holoien, A. Thompson Todd, J. L. Prieto, Dong Subo, J. V. Shields, et al., Publ. Astron. Soc. Pacif. 129, 104502 (2017).ADSCrossRefGoogle Scholar
  26. 26.
    G. Lange, Leningr. Univ. Astron. Obs. Bull., No. 2, 91 (1933).Google Scholar
  27. 27.
    T. J. Moffett and T. G. Barnes, Astrophys. J. 55, 389 (1984).ADSCrossRefGoogle Scholar
  28. 28.
    P. Parenago and B. V. Kukarkin, Perem. Zvezdy 5, 331 (1940).Google Scholar
  29. 29.
    C. Payne-Gaposhkin and S. Gaposhkin, Publ. Astron. Soc. Pacif. 75, 193 (1963).ADSCrossRefGoogle Scholar
  30. 30.
    G. Romano, Publ. Osserv. Astron. Padova, No. 116, 3 (1959).Google Scholar
  31. 31.
    A. Sandage, Astrophys. J. 128, 150 (1958).ADSCrossRefGoogle Scholar
  32. 32.
    A. Sandage and G. A. Tammann, Astrophys. J. 157, 683 (1969).ADSCrossRefGoogle Scholar
  33. 33.
    B. J. Shappee, J. L. Prieto, D. Grupe, C. S. Kochanek, K. Z. Stanek, G. de Rosa, S. Mathur, Y. Zu, et al., Astrophys. J. 788, 48 (2014).ADSCrossRefGoogle Scholar
  34. 34.
    J. Smak, Acta Astron. 16, 11 (1966).ADSGoogle Scholar
  35. 35.
    D. G. Turner, M. Abdel-Sabour Abdel-Latif, and L. N. Berdnikov, Publ. Astron. Soc. 118, 410 (2006).ADSCrossRefGoogle Scholar
  36. 36.
    W. Zonn and I. Semeniuk, Acta Astron. 9, 41 (1959).Google Scholar

Copyright information

© Pleiades Publishing, Inc. 2019

Authors and Affiliations

  1. 1.Sternberg Astronomical InstituteMoscow State UniversityMoscowRussia
  2. 2.Institute of AstronomyRussian Academy of SciencesMoscowRussia

Personalised recommendations